Door-handle-locking device



v/imm J. M. PETERSON AND J. MEREDITH.

DOOR HANDLE LOCKING DEVICE.

APPLICATION FILED MAR. 3. 1916.

Patented July 27.1920.

JOHN MQFFETT rn'rnnsonilmnJOHN-MEREDITH, on NEWCASTLE-ON-TYNE, ENGLAND.

. DOOR-HANDLE-LOGKING DEVICE.

Specification of Letters Patent.

Patented Ju1y27,1920.

Application filediMarch a, 1916. SerialNo. 81,875.

DoonHan'dle-Locking Devices, of which the following is the specification.

The object of our invention is toprovide a means or appliance by which the square section spindle operating the'latch' of a doorv lock is when desired, prevented from turning, and in turn the latch of the lock remains in a locking position.

Our invention is intended tobefittedto the inside of a door, so that further locking or bolting of the door is unnecessary.

e attain our object by fitting around the handle spindle of the lock and next to the door a locking plate, having in the middle a slotted hole slightly larger than the section of the spindle.

This hole is extended downward but made circular, and of a diameter slightly in excess of the measurement from one extreme corner to the otherextreme corner of the section of the spindle.

The locking plate is arranged to move up and down vertically in guides attached to the back of a rose plate, so that when the square part of the hole embraces the spindle, such spindle cannot be turned, while if the locking plate is raised so that the circular part of the slotted hole surrounds the spindle, such spindle can be turned if desired.

The locking plate is retained in its top position by means of a spring secured to the back of the rose plate, such spring pressing against the back of the locking plate when such plate is in its upper or top position.

To work this locking plate we provide a small lever with the middle turning upon a pin fixed to the rose plate. The end of the lever next to the locking plate is turned down so as to come under the locking plate, part of the rose plate being cut away to allow of the working of the lever.

A stud or the like is secured to the end of the lever which engages loosely in a slot in the side of the locking plate. I

At the other end of the lever,-we provide a small knob or ,thelike for operating such lever. The knob isfitted at the outer side of the rose plate and connected through a slot in the rose plate tothe end of the lever. By moving the knob up or down, the lever inturn works the locking plate down or up, and the desired result is obtained.

And order that our invention maybe completely understood reference should be made to the accompanying sheet of draw- 1ngs:- 3 1 a *Figure 1 represents a back view-showing section of the spindle with rectangular hole in looking plate fitting three sides of the spindle. It also shows the continuation and clrcular portion of the hole in such locking plate, and the lever by which such locking plate is moved-up or down either locking the spindle or allowingit to turn.

Fig. 2 is a section of the rose plate and locking plate vertically through the center of the latter. It shows also the guides for the locking plate and retaining spring for same.

Fig. 3 is a front view of the rose plate, and shows the knob which is attached to the lever for working the latter, and the slot in the rose plate to permit such attachment and working.

Fig. 4: is a section of the lever and part of the rose plate showing how the lever engages in the sides of the locking plate.

Referring more particularly to the drawings, which illustrate a preferred form of the invention, 1 represents a rose plate and 2 a spindle of a door knob extending through the rose plate; this spindle is preferably a square cross section. A locking plate 3 is slidably attached to the rose plate, advantageously on the rear of the same, by means of guides 4. These guides are in the form of two metal straps one of which is, for convenience, placed above the spindle and the other below. Each of these guides or straps has its ends attached to the rose plate at the opposite sides of the locking' plate 3, and the intermediate portion of said guides is channeled so as to allow the locking plate to easily slide therethrough.-

The locking plate 3 is provided with a slotted portion adapted to embrace the spindle 2, part of said slotted portion being formed toclosely engage three sides of the spindle, whereby said spindle is held 7 against rotation, and the remainder or conbeing secured at one end by any satisfactory tinuation of the slotted portion being enlarged so when the same-is surrounding the spindle, said spindle will be free to rotate.

Means for holding the locking plate in its inoperative position is provided, which consists of a small leaf spring 7 situated at one end of the locking plate, and mounted in a recess in the rose plate 1, the spring means, preferably by ajrivet to the rose plate. Therefore, it will be seen that when the'locking plate 3 is slid in one direction one end of'the' same will slide over'the the spring 7 and as the spring is slightly through anelongated slot 87in the rose plate,

which'allows for a sufiicient movement of the lever 5 to effectively slide the locking plate 3 from its operative to its inoperative position regarding the spindle.

What we do claim as our invention and desire tosecure by Letters Patent is 7 The combination with a door knob spindle and rose plate having a relatively short slot extending along a marginal portion thereof, of a locking plate for the spindle supported for sliding movement upon the rose plate into and out'of locking engagement with the knob spindle, means for retaining the locking plate in positionout of looking enga'gement with the knob spindle, and operating means for the locking platecomprising a lever pivota-lly'suppoited intermediate its ends upon the rose plate within the outer marginaledge'portion thereof and to one side of the locking plate, a pivotal connection'between one end of said lever and the locking "plate at one side thereof, and a finger manipulatingpart' connected to the other end of the lever and extending through thej'slotto thliflOllhSlde of the plate. p 7 i w JOHN MoFFETr PETERSON JOHN MEREDITH.

Witnesses;

R, WATSON,

J. SANDER 

